Intra-Lake Arcellinida (Testate Lobose Amoebae) Response to Winter De-icing Contamination in an Eastern Canada Road-Side “Salt Belt” Lake

Cockburn, Charlotte; Gregory, Braden R.B.; Nasser, Nawaf A.; Patterson, R. Timothy

doi:10.1007/s00248-020-01513-w

Cited by 14 publications

(14 citation statements)

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“…As has been demonstrated elsewhere the distribution of elemental Ti throughout the Harvey Lake basin provides data on what areas of the lake are best suited to collect cores where this proxy of runoff might be preserved (e.g., [26][27][28][29][30]). For example, the area of the lake at the mouth of Little Sucker Brook, has the lowest levels of Ti measured in the lake, suggesting that the agricultural lands drained are not a significant source of this runoff proxy (Fig.…”

Section: Catchment Sediment Runoffmentioning

confidence: 87%

“…The development of X-ray fluorescent (XRF) technology has revolutionized geological research as it can be used to analyze sediment geochemistry much faster and with lower cost than possible using traditional geochemical techniques [23][24][25]. Titanium (Ti) has been demonstrated to be a proxy of lake catchment runoff [26][27][28][29][30]. Mapping the distribution of this element in a lake basin using core scanning XRF techniques provides cost-effective data on sediment provenance, which permits researchers to identify areas of a lake receiving enhanced runoff, and therefore where paleo-Ti signals might be best preserved.…”

Section: Supplementary Informationmentioning

confidence: 99%

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A novel protocol for mapping the spatial distribution of storm derived sediment in lakes

et al. 2020

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A novel geomatics methodology is presented for locating optimal lake coring sites to potentially capture evidence of paleo-storms. One hundred sediment-water interface samples collected from Harvey Lake, NB, Canada (45° 43′ 45″ N; 67° 00′ 25″ W) were analyzed using: end member mixing analysis (EMMA), which can be used to recognize modal grain size distributions derived from sediment resuspension during major storms; and Itrax X-ray fluorescence core scanningderived Ti, an indicator of catchment runoff, which is enhanced during major storm events. Simple geospatial models based on lake bathymetric and historical wind speed data (Fredericton INTL A climatological station; 1953-2015) were used to determine lake bottom areas susceptible to wave base sediment resuspension. EMMA End Member (EM) 02 (mode = 40 μm) was widely distributed in areas > 4.4 m water depth, which have been unimpacted by wave base remobilization since 1953. Deposition of EM 02 in deeper water areas was interpreted to be of major storm derivation, the result of fallout of resuspended sediments from the water column. This EM was most concentrated in the central part of the lake at >6 m water depth, as well as at the z-max (~ 11 m), and in Herbert's Cove (3-6 m). The main source of runoff derived Ti into the lake was through Sucker Brook, with the highest concentrations in Herbert's Cove and the central part of the lake, including the lake z-max. This assessment indicates that the best undisturbed sedimentary record of paleo-storms is mostly likely in the central part of the lake north of the z-max at water depths of > 6 m, as well as deeper water areas of Herbert's Cove.

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Section: Catchment Sediment Runoffmentioning

confidence: 87%

Section: Supplementary Informationmentioning

confidence: 99%

A novel protocol for mapping the spatial distribution of storm derived sediment in lakes

et al. 2020

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“…According to Patterson and Kumar (2002), SDI values should be between 0.1 and 1.5 if an assemblage is dominated by one or two taxa. Such values can be related to stressful conditions for testate amoebae, whereas higher values (1.5-2.5) are considered to indicate less stressful conditions (Sigala et al 2018;Cockburn et al 2020).…”

Section: Statistical Analysesmentioning

confidence: 99%

Responses of testate amoebae assemblages (Amoebozoa: Arcellinida) to recent volcanic eruptions, inferred from the sediment record in Laguna Verde, southern Patagonia, Argentina

et al. 2021

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There is little knowledge about testate amoebae in lakes and their responses to volcanic eruptions. To address this knowledge gap, we studied the paleoecology of these protists in a sediment record from Laguna Verde, a lake located east of the southern Patagonian Ice Field, in Santa Cruz Province, Argentina. The lake is under the influence of volcanic eruptions from Lautaro Volcano, Chile, * 42 km WNW of Laguna Verde. We evaluated the response of 11 testate amoeba morphospecies in the lake to the last four Lautaro eruptions, using a 61-cm sediment core. Calcium (Ca), a major element of volcanic ash, was the most important variable explaining testate amoeba variability in the three zones determined by detretended correspondence analysis. We identified four declines in testate amoeba abundance and diversity associated with tephra deposition. Poisson regression analysis revealed that Difflugia immanata, D. bidens, and D. glans strain ''glans'' decrease after deposition of tephra layers. In contrast, Centropyxis constricta strain ''constricta,'' C. aculeata strain ''aculeata'' and Zivkovicia compressa respond positively to ash deposition. Our findings suggest a high resilience of testate

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“…In most studies these organisms are primarily identified and enumerated morphologically and are routinely used to provide insights into both substrate character and the general ecological health of lakes (Patterson & Kumar, 2002). They are routinely used for specific applications such as monitoring perturbations in lacustrine systems including; heavy metal contamination (Nasser et al, 2020; Yang et al, 2011), road salt loading (Cockburn et al, 2020) and eutrophication (Macumber et al, 2020). In terrestrial habitats, they are used in peatland restoration management (Carballeira & Pontevedra-Pombal, 2021; Marcisz et al, 2016; Valentine et al, 2013), or to evaluate the impact of open-cast coal mining on soil (Wanner & Dunger, 2001).…”

Section: Introductionmentioning

confidence: 99%

A needle in a haystack: a new metabarcoding approach to survey diversity at the species level of Arcellinida (Amoebozoa: Tubulinea)

González‐Miguéns

Cano

Guillén-Oterino³

et al. 2022

Preprint

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Environmental DNA-based diversity studies have increased in popularity with the development of high throughput sequencing technologies. This permits the potential simultaneous retrieval of vast amounts of molecular data from many different organisms and species, thus contributing to a wide range of biological disciplines. Environmental DNA protocols designed for protists often focused on the highly conserved small subunit of the ribosome gene, that does not permit species-level assignments. On the other hand, eDNA protocols aiming at species-level assignments allow a fine level ecological resolution and reproducible results. These protocols are currently applied to organisms living in marine and shallow lotic freshwater ecosystems, often in a bioindication purpose. Therefore, in this study, we present a species-level eDNA protocol, designed to explore diversity of Arcellinida (Amoebozoa: Tubulinea) testate amoebae taxa, that is based on mitochondrial cytochrome oxidase subunit I (COI). These organisms are widespread in lentic water bodies and soil ecosystems. We applied this protocol to 42 samples from peatlands, estuaries and soil environments, recovering all the infraorders in Glutinoconcha (with COI data), except for Hyalospheniformes. Our results revealed an unsuspected diversity in morphologically homogeneous groups such as Cylindrothecina, Excentrostoma or Sphaerothecina. With this protocol we expect to revolutionize the design of modern distributional Arcellinida surveys. Our approach involve a rapid and cost effective analysis of testate amoeba diversity living in contrasted ecosystems. Therefore, Arcellinida clade have the potential to be established as a model group for an array of theoretical and applied studies.

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Intra-Lake Arcellinida (Testate Lobose Amoebae) Response to Winter De-icing Contamination in an Eastern Canada Road-Side “Salt Belt” Lake

Cited by 14 publications

References 68 publications

A novel protocol for mapping the spatial distribution of storm derived sediment in lakes

A novel protocol for mapping the spatial distribution of storm derived sediment in lakes

Responses of testate amoebae assemblages (Amoebozoa: Arcellinida) to recent volcanic eruptions, inferred from the sediment record in Laguna Verde, southern Patagonia, Argentina

A needle in a haystack: a new metabarcoding approach to survey diversity at the species level of Arcellinida (Amoebozoa: Tubulinea)

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